High availability packet forwarding apparatus and method

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) H04L 12/46 (2006.01)

Patent

CA 2441470

A high availability packet forwarding router (102) for an internet protocol (IP) network, includes two control processors (104,106), one or more service termination cards (STCs)(112) with forwarding information bases (FIBs)(108,110), and a packet forwarding engine (214). The two processors run asynchronously in a master/standby relationship. Integrity of processes running on the control processors is monitored and the forwarding engine forwards packets according to a FIB maintained by an in-service one of the control processors. Hitless failover and hitless software upgrades are supported.

Cette invention concerne un routeur (102) d'acheminement de paquets à haute disponibilité utilisé dans un réseau de protocole Internet (IP), et comprenant deux processeurs pilotes (104, 106), une ou plusieurs cartes de terminaison de service (STC) (112) pourvues de bases d'informations d'acheminement (FIB) (108, 110), ainsi qu'un moteur d'acheminement de paquets (214). Les deux processeurs fonctionnent de manière asynchrone dans un rapport maître/attente. L'intégrité des procédés fonctionnant sur les processeurs pilotes est surveillée, et le moteur d'acheminement achemine des paquets selon une base d'informations d'acheminement conservée par le processeur pilote en service. Il est ainsi possible d'effectuer un basculement sans à-coup ainsi que des mises à jour de logiciels sans à-coup.

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